One example is instructive. The rate at which aircraft locations are electronically manipulated, “spoofed,” increased 500 percent in the first three quarters of 2024. An average of 1,500 flights a day were impacted by the beginning of September. In a recent survey of almost 2,000 flight crew members, 70 percent described their concerns about the impact on aviation safety as either “very high” or “extreme.”

The world depends upon signals from GPS and other global navigation satellite systems (GNSS) to underpin virtually every technology. Yet the essential positioning, navigation, and timing (PNT) service they provide is incredibly vulnerable.

Weak and Vulnerable Signals

These signals from space are, of necessity, very weak. The sun shining produces stronger radio signals than a GPS satellite. Yet, through a miracle of technology, receivers on earth can find coded signals in the radio noise floor, decipher them, and tell Americans where they are and the exact time.

Exceptionally weak signals mean that almost any interference on the right frequency can prevent them from getting through. For less than ten dollars, delivery drivers looking to electronically hide from their employers, people worried about being tracked by their spouse or the government, and bad actors wanting to disable receivers can buy a GPS “jammer” from any number of internet vendors. Such sales are illegal in most countries, as is the use of such devices. However, enforcement is almost always lax or nonexistent.

Keep in mind, signal specifications were made public as part of GPS becoming America’s “gift to the world,” with the US government encouraging GPS’s broad use. Other GNSS operators did the same.

While incredibly successful in promoting the wide adoption of signals, it has also facilitated spoofing. Compounding the problem, advances in digital technology brought inexpensive software-defined transmitters into the world. Now, for a few hundred dollars, a reasonably sophisticated hobbyist can easily imitate GPS and other satellite navigation signals.

The necessity of PNT services for everyday life and over-reliance on GPS/GNSS for PNT makes the vulnerability of signals to denial and imitation a primary weapon in conflicts around the globe.

This impacts millions of those not involved in these conflicts because any receiver within line-of-sight of the interfering transmitter can be affected. Thus, cell phone systems in Finland are degraded by drone defenses in St. Petersburg. First responders across the Middle East must use paper maps because of ongoing conflicts. Ships and aircraft, hundreds of miles from military actions, lose their navigation and collision avoidance systems. Given the number of conflicts around the planet, many regions of the world are adversely affected.

To date, appeals by international maritime and aviation professional organizations have failed to make an impact on the problem. The same is true for resolutions by the United Nation’s International Maritime Organization and International Civil Aviation Organization. The International Telecommunications Union (ITU), which seems to have the principal jurisdiction for this, is proving similarly ineffective.

At its World Radio Conference in December 2023, ITU delegates approved what, at first glance, appears to be a strong resolution enjoining member states to refrain from interfering with GNSS signals. The only way the resolution could pass was with an exception allowing interference “for security or defense purposes.” It is hard to imagine any other reason for which a state would disrupt signals.

Despite the failures of international diplomacy to mitigate this growing problem, there is likely a path for it to be much more successful. Attacks on GPS and other GNSS signals are useful only because most nations and systems over-depend on them with few alternatives.

Fortunately, many countries are actively considering establishing robust and resilient terrestrial PNT systems to complement signals from space. These can provide GPS-like information, but do not have common vulnerabilities and failure modes with GNSS.

The US Department of Transportation, the lead in America for civil PNT issues, said that intelligently using a combination of independent signals from space, terrestrial broadcast, and fiber cable can be the foundation of a resilient national PNT architecture.

Establishing such a system of systems will not make the services invulnerable. However, it will make them hard enough to disrupt so that antagonists will look elsewhere for opportunities to create mischief. Some nations are already taking significant steps toward achieving such resilience.

South Korea and Saudi Arabia field high-power terrestrial systems that provide PNT. The United Kingdom fields a partial system and seems poised to expand it, as well as a deployable capability. Much of Russia is also served by such a system.

China has the world’s most complete and advanced resilient PNT architecture. It includes three constellations of satellites in different orbital planes, an extensive terrestrial broadcast system, and a 20,000-kilometer fiber timing network with 295 “timing stations.”

Yet much of the world remains vulnerable to disruption. Those who interfere are therefore incentivized.

International diplomacy, in the form of the United Nations, can help improve the inevitable transition to resilient PNT by encouraging states to implement sovereign terrestrial systems. These systems will complement and cooperate with GNSS, while also operating independently.

As part of this effort, international standards can be developed to ensure aircraft, ships, and vehicles are able to seamlessly transit between nations. Technical assistance can be provided to nations with little local expertise in the field.

These efforts will greatly reduce the incentive to interfere with GNSS, thereby making it safer and more reliable. It will also reinforce the sovereignty and security of every involved nation.

The alternative is to continue down the path of increasing interference and increasing risk to life and property. Safety margins are already impacted. Ships are already colliding, and passenger aircraft are nearly straying, unannounced, into hostile airspace, all because of spoofing. It is only a matter of time before the world witnesses an avoidable tragedy.

The international community, perhaps in the form of a United Nations task force, must intervene to protect these fragile signals from space and disincentivize future disruptions.

Safer and more reliable signals from space and resilient sovereign terrestrial PNT are in the long-term interest of every nation. Diplomatic efforts must illuminate that shared interest bring parties together and nurture progress for everyone’s benefit.

Dana A. Goward is President of the Resilient Navigation and Timing Foundation, www.RNTFnd.org, an educational and scientific charity. He is a member of the president’s National Space-based Positioning, Navigation, and Timing Advisory Board and formerly served as the maritime navigation authority for the United States. Views expressed in this article are the author’s own. 

How Diplomacy Can Save GPS was originally published on Global Security Review.

The FY 2025 budget focuses on simpler satellite networks. Notable decreases occur in launch and classified activities, while increases are found in position, navigation, and timing. The Space Force continues moving towards more distributed, resilient, and cost-effective space capabilities, including GPS satellites and narrowband communications. The intention signaled for space operations is to enhance the Space Force’s ability to adapt and respond to emerging threats. By prioritizing the development of distributed and proliferated satellite networks to ensure resilient space operations, the Space Force places a continued focus on low Earth orbit (LEO). This aligns with defense goals of redundancy and rapid deployment, enhancing space “competitive endurance,” a strategy announced in early 2023 by Chief of Space Operations General B. Chance Saltzman.”

In General (Ret.) John Raymond’s often quoted words, the Department of Defense (DoD) and Space Force need to “exploit what we have, buy what we can, build what we must.” The DoD will increase the integration of commercial satellite services to reduce costs and accelerate deployment. The belief behind this policy is that to strengthen partnerships with commercial satellite providers is to capitalize on existing technologies and infrastructure, which is largely preferable to government doing it by itself. While it is a politically and operationally challenging process, the budget sequence necessitates more flexible and adaptive budget planning processes within the Space Force and other related agencies. By adopting these practices, the Space Force might better navigate budget constraints and funding adjustment, while advancing its strategic goals in space defense.

Regarding proliferation of smaller commercial assets for the sake of resilience in space, and within the currently prevalent DoD cognitive framework for the Space Force, the link between resilience and deterrence was further validated in April 2023 by John F. Plumb, former Assistant Secretary of Defense for Space Policy. In remarks at the Space Foundation’s 38th Space Symposium in Colorado Springs, Plumb said, “We will do that first and foremost by investing in resilience. We must expect to take punches in space in a near-peer conflict. A resilient architecture means we will be prepared to absorb those blows. With sufficient resilience, we hope to deter an adversary from attacking in the first place, because the value of any such attack will be greatly diminished.”

However, in space as in any other domains, resilience does not qualify as deterrence. Before events occur on the battlefield, deterrence is first and foremost built not merely based on actual capabilities, but on the ability to clearly communicate to the adversaries what such capabilities will do to them, if used. But deterrence requires a third factor, which is credibility. And the credibility of passive defensive posturing is where the real problems start.

To prevail over adversaries such as Russia and China, the West requires a genuine understanding of the adversary’s own decision-making process. If the West fails to understand that adversaries fundamentally value space as an offensive domain, the West will fail to protect its space assets—unless the Space Forces build a credible offensive counterforce capability. For active defense of critical Western space and terrestrial infrastructures to be sufficient to ensure credible deterrence, the Space Force must view space systems as a critical infrastructure and not merely a support desk for terrestrial operations.

The Senate Armed Services Committee (SASC) on June 14, 2024, cleared its version of the FY 2025 National Defense Authorization Act (NDAA). The bill was then headed to the Senate floor. The legislation, which is yet to be released in full, includes compromise language on a long-standing dispute over the transfer of Air National Guard space units to the active-duty Space Force. That does not mean the political process ends there. In the meantime, the House passed its own version of the NDAA, which includes several social policy amendments, that eliminates paid leave for servicemembers to cross state lines for an abortion, eliminates controversial diversity initiatives, and eliminates taxpayer funding for “gender-affirming care,” which is likely to start another cycle of congressional haggling.

There are professionally constructive developments on the commercial side, though, as the Senate Armed Services Committee includes requirements for reviews of investment policy and performance evaluation. The bill also authorizes DoD to identify poor-performing contractors and require approval for additional contracts. The question remains, though, whether government should still retain an exclusive role in building certain specific space defense capabilities on its own and which ones these should be.

When and how the congressional process concludes, and the end game for the FY 2025 Space Force budget, remain to be seen. It should be extremely clear—no less is at stake than the US and its allies prevailing against common adversaries, for, in, and from space. In short, getting funding priorities right may affect who controls the high ground.

Christophe Bosquillon is a Senior Fellow at the National Institute for Deterrence Studies. He has over 30 years of international experience in general management, foreign direct investment, and private equity and fund management across various industries in Europe and the Pacific Basin. Views expressed in this article are the author’s own.

Congressional Haggling Jeopardizes the US Space Force FY 2025 Budget was originally published on Global Security Review.